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US6912982B2 - Device for changing the angle of rotation of a camshaft relative to a drive wheel of an internal combustion engine - Google Patents

Device for changing the angle of rotation of a camshaft relative to a drive wheel of an internal combustion engine Download PDF

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Publication number
US6912982B2
US6912982B2 US10/783,954 US78395404A US6912982B2 US 6912982 B2 US6912982 B2 US 6912982B2 US 78395404 A US78395404 A US 78395404A US 6912982 B2 US6912982 B2 US 6912982B2
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US
United States
Prior art keywords
fluid
camshaft
combustion engine
internal combustion
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/783,954
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US20040187818A1 (en
Inventor
Kai Lehmann
Timo Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DaimlerChrysler AG filed Critical DaimlerChrysler AG
Assigned to DAIMLERCHRYSLER AG reassignment DAIMLERCHRYSLER AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEHMANN, KAI, SCHMIDT, TIMO
Publication of US20040187818A1 publication Critical patent/US20040187818A1/en
Application granted granted Critical
Publication of US6912982B2 publication Critical patent/US6912982B2/en
Assigned to DAIMLER AG reassignment DAIMLER AG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DAIMLERCHRYSLER AG
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423—Details relating to the hydraulic feeding circuit
    • F01L2001/34426—Oil control valves
    • F01L2001/3443—Solenoid driven oil control valves

Definitions

  • the invention relates to a device for changing the angle of rotation of a camshaft arranged in a cylinder head of an internal combustion engine relative to a drive wheel of the internal combustion engine by a hydraulic adjusting arrangement disposed between the drive wheel and the camshaft.
  • DE 195 02 496 A1 discloses a device of the generic type for changing the timing of an internal combustion engine.
  • the internal combustion engine has a cylinder head in which, a camshaft is mounted, the camshaft being provided at its one end with the device for changing the timing.
  • the device has a hydraulic adjusting arrangement which is subjected to fluid medium in a specific manner via an on/off valve.
  • the camshaft is enclosed in its end region, which faces the device, by a connecting bracket which is connected integrally to a valve housing for accommodating the on/off valve.
  • the connecting bracket is preferably positioned within the cylinder head, specifically directly behind its end wall of the cylinder head which faces the device. This means that the connecting bracket can be arranged only at the front or at the rear end of the camshaft. Oil is supplied to the on/off valve via the end wall of the cylinder head.
  • a hydraulic adjusting arrangement is arranged between the drive wheel and the camshaft and is connected to a fluid circuit of the internal combustion engine, and wherein the fluid supply to the adjusting arrangement is controlled by an on/off valve, the on/off valve is mounted near the camshaft and is supplied with fluid via the camshaft.
  • One substantial advantage of the invention is that, because the control device is supplied with fluid via the camshaft, only short fluid lines are necessary. This not only has the positive result that the lines are short and inexpensive to produce, but it also reduces pressure losses so that the comparatively high fluid pressure required for the adjustments in the internal combustion engine can be obtained.
  • the fluid is supplied to the control device via the camshaft, which provides for short fluid lines. Furthermore, the number of fluid lines, which would be necessary if the device were supplied with fluid medium from another internal combustion engine component, such as for example the cylinder head, can be reduced.
  • a further advantage of the invention is that the arrangement of the on/off valve is not restricted to locations at the ends of the camshaft or the end walls of the cylinder head but rather it is only important that it is in the vicinity of the camshaft.
  • the on/off valve can be arranged in the cylinder head, in the cylinder head cover, in a camshaft bearing or in the crankcase of the internal combustion engine.
  • FIG. 1 shows a control valve in close proximity to a fluid supply from which the operating fluid for the operation of the angle adjustment device is derived in a controllable manner
  • FIG. 2 is a side view of the arrangement shown in FIG. 1 .
  • the figure shows a part of a cylinder head 1 of an internal combustion engine, camshaft bearings 2 for mounting at least one camshaft 3 , only one bearing 2 of which can be seen here, and a cylinder head cover 4 which covers the cylinder head 1 and at least one camshaft 3 .
  • the cylinder head 1 is disposed on a cylinder block (not illustrated here) of the internal combustion engine.
  • the camshaft bearings 2 each have a bearing shell 2 a and a bearing cover 2 b , the bearing shells 2 a advantageously being integrally formed on the cylinder head 1 and the bearing covers 2 b either being separate parts or, as shown here, being formed integrally with the cylinder-head cover 4 .
  • a hydraulic adjusting arrangement 15 is arranged between the drive wheel and camshaft 3 and is connected to a fluid circuit of the internal combustion engine, the fluid admission being controlled in a specific manner via an on/off valve 5 .
  • the on/off valve 5 is supplied according to the invention with fluid via the camshaft 3 .
  • the on/off valve 5 may be arranged in the cylinder head 1 , in one of the camshaft bearings 2 , in the cylinder-head cover 4 or in the crankcase of the internal combustion engine.
  • the on/off valve 5 is at least partially integrated in one of the camshaft bearings 2 , specifically and advantageously in the bearing cover 2 b mounted on a bearing shell 2 a of the camshaft bearing 2 .
  • the bearing cover 2 b has a receiving bore 6 into which the on/off valve 5 can be inserted.
  • the on/off valve 5 has, as illustrated in the figure by way of example, at least one fluid inlet opening 7 , at least one fluid outlet opening 8 for supplying the hydraulic adjusting arrangement with fluid and at least one fluid return-flow opening 9 .
  • the openings 7 to 9 of the on/off valve 5 are connected to fluid bores 10 to 12 which are arranged in the camshaft bearing 2 and can expediently be cast in advance.
  • the fluid-bores 10 to 12 may also be provided in other internal combustion engine components.
  • the fluid inlet 10 supplies the on/off valve 5 with fluid via the fluid inlet opening 7 .
  • the fluid outlet 11 which is connected to the fluid outlet opening 8 , serves to transfer the fluid from the on/off valve 5 to the hydraulic adjusting arrangement 15 and the fluid return line 12 ensures with the fluid return-flow opening 9 that the excess fluid from the on/off valve 5 is returned to the fluid circuit of the internal combustion engine.
  • the fluid inlet 10 advantageously extends in the direction of a vertical axis 13 of the internal combustion engine and the fluid inlet 7 opens from above or from below into the on/off valve 5 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

In a device for changing the angle of rotation of a camshaft arranged in a cylinder head of an internal combustion engine relative to a drive wheel of the internal combustion engine, wherein a hydraulic adjusting arrangement is arranged between the drive wheel and the camshaft and is connected to a fluid circuit of the internal combustion engine, and wherein the fluid supply to the adjusting arrangement is controlled by an on/off valve, the on/off valve is mounted near the camshaft and is supplied with fluid via the camshaft.

Description

BACKGROUND OF THE INVENTION
The invention relates to a device for changing the angle of rotation of a camshaft arranged in a cylinder head of an internal combustion engine relative to a drive wheel of the internal combustion engine by a hydraulic adjusting arrangement disposed between the drive wheel and the camshaft.
DE 195 02 496 A1 discloses a device of the generic type for changing the timing of an internal combustion engine. The internal combustion engine has a cylinder head in which, a camshaft is mounted, the camshaft being provided at its one end with the device for changing the timing. The device has a hydraulic adjusting arrangement which is subjected to fluid medium in a specific manner via an on/off valve. The camshaft is enclosed in its end region, which faces the device, by a connecting bracket which is connected integrally to a valve housing for accommodating the on/off valve. The connecting bracket is preferably positioned within the cylinder head, specifically directly behind its end wall of the cylinder head which faces the device. This means that the connecting bracket can be arranged only at the front or at the rear end of the camshaft. Oil is supplied to the on/off valve via the end wall of the cylinder head.
Reference is also made to DE 44 06 990 in respect of the general technical background.
It is the object of the invention to provide fluid flow control device by which the fluid supply to a fluid operated device can be controlled in a simple manner and the fluid flow control device can be arranged in different ways.
SUMMARY OF THE INVENTION
In a device for changing the angle of rotation of a camshaft arranged in a cylinder head of an internal combustion engine relative to a drive wheel of the internal combustion engine, wherein a hydraulic adjusting arrangement is arranged between the drive wheel and the camshaft and is connected to a fluid circuit of the internal combustion engine, and wherein the fluid supply to the adjusting arrangement is controlled by an on/off valve, the on/off valve is mounted near the camshaft and is supplied with fluid via the camshaft.
One substantial advantage of the invention is that, because the control device is supplied with fluid via the camshaft, only short fluid lines are necessary. This not only has the positive result that the lines are short and inexpensive to produce, but it also reduces pressure losses so that the comparatively high fluid pressure required for the adjustments in the internal combustion engine can be obtained. According to the invention the fluid is supplied to the control device via the camshaft, which provides for short fluid lines. Furthermore, the number of fluid lines, which would be necessary if the device were supplied with fluid medium from another internal combustion engine component, such as for example the cylinder head, can be reduced.
A further advantage of the invention is that the arrangement of the on/off valve is not restricted to locations at the ends of the camshaft or the end walls of the cylinder head but rather it is only important that it is in the vicinity of the camshaft. As a result, the on/off valve can be arranged in the cylinder head, in the cylinder head cover, in a camshaft bearing or in the crankcase of the internal combustion engine.
The invention will be described below on the basis of the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows a control valve in close proximity to a fluid supply from which the operating fluid for the operation of the angle adjustment device is derived in a controllable manner, and
FIG. 2 is a side view of the arrangement shown in FIG. 1.
 DESCRIPTION OF AN EXEMPLARY EMBODIMENT
The figure shows a part of a cylinder head 1 of an internal combustion engine, camshaft bearings 2 for mounting at least one camshaft 3, only one bearing 2 of which can be seen here, and a cylinder head cover 4 which covers the cylinder head 1 and at least one camshaft 3. The cylinder head 1 is disposed on a cylinder block (not illustrated here) of the internal combustion engine.
The camshaft bearings 2 each have a bearing shell 2 a and a bearing cover 2 b, the bearing shells 2 a advantageously being integrally formed on the cylinder head 1 and the bearing covers 2 b either being separate parts or, as shown here, being formed integrally with the cylinder-head cover 4.
To change the angle of rotation of the camshaft 3 relative to a drive wheel 14 of the internal combustion engine, a hydraulic adjusting arrangement 15 is arranged between the drive wheel and camshaft 3 and is connected to a fluid circuit of the internal combustion engine, the fluid admission being controlled in a specific manner via an on/off valve 5.
In order to make it possible for the device to be supplied with fluid in a simple manner and to make it possible for the device to be arranged in a various ways, the on/off valve 5 is supplied according to the invention with fluid via the camshaft 3.
The on/off valve 5 may be arranged in the cylinder head 1, in one of the camshaft bearings 2, in the cylinder-head cover 4 or in the crankcase of the internal combustion engine. In the present exemplary embodiment, the on/off valve 5 is at least partially integrated in one of the camshaft bearings 2, specifically and advantageously in the bearing cover 2 b mounted on a bearing shell 2 a of the camshaft bearing 2. To at least partially accommodate the on/off valve 5, the bearing cover 2 b has a receiving bore 6 into which the on/off valve 5 can be inserted.
The on/off valve 5 has, as illustrated in the figure by way of example, at least one fluid inlet opening 7, at least one fluid outlet opening 8 for supplying the hydraulic adjusting arrangement with fluid and at least one fluid return-flow opening 9. To supply the hydraulic adjusting arrangement with fluid, the openings 7 to 9 of the on/off valve 5 are connected to fluid bores 10 to 12 which are arranged in the camshaft bearing 2 and can expediently be cast in advance. Depending on the arrangement of the on/off valve 5 within the internal combustion engine, the fluid-bores 10 to 12, however, may also be provided in other internal combustion engine components.
The fluid inlet 10 supplies the on/off valve 5 with fluid via the fluid inlet opening 7. The fluid outlet 11, which is connected to the fluid outlet opening 8, serves to transfer the fluid from the on/off valve 5 to the hydraulic adjusting arrangement 15 and the fluid return line 12 ensures with the fluid return-flow opening 9 that the excess fluid from the on/off valve 5 is returned to the fluid circuit of the internal combustion engine.
The fluid inlet 10 advantageously extends in the direction of a vertical axis 13 of the internal combustion engine and the fluid inlet 7 opens from above or from below into the on/off valve 5.

Claims (1)

1. A device for changing the angle of rotation of a camshaft (3) arranged in a cylinder head (1) of an internal combustion engine relative to a drive wheel (14) of the internal combustion engine, including a hydraulic adjusting arrangement (15) which is effective between the drive wheel (16) and the camshaft (3) and is connected to a fluid circuit of the internal combustion engine, said camshaft (3) being mounted on said cylinder head by camshaft bearings (2) having a bearing cover (2 b) and an on/off spool valve (5) horizontally disposed in said bearing cover (26) so as to extend adjacent the hydraulic adjusting arrangement (15) over, and across, the camshaft (3), said bearing cover further including fluid passages for supplying fluid to, and discharging it from, said hydraulic adjustment arrangement (15) and the on/off spool valve (5) having at least one fluid inlet opening (7) with a fluid inlet line (10) extending essentially vertically between the camshaft (3) and the on/off valve spool (5) disposed in the bearing cover (26) centrally above the camshaft (3) and at least one fluid outlet opening (8) of an outlet passage (11) at one side of the inlet line (10) for supplying the adjacent hydraulic adjusting arrangement with fluid and at least one fluid return-flow opening (9) with an outlet passage (10) disposed at the other side of the inlet line (10) for returning the hydraulic fluid to the fluid circuit of the internal combustion engine.
US10/783,954 2003-02-22 2004-02-20 Device for changing the angle of rotation of a camshaft relative to a drive wheel of an internal combustion engine Expired - Fee Related US6912982B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003107624 DE10307624A1 (en) 2003-02-22 2003-02-22 Camshaft device for relative change in a camshaft's rotary angle to an internal combustion engine's driving wheel has a hydraulic adjusting system active between the driving wheel and the camshaft
DE10307624.7 2003-02-22

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US20040187818A1 US20040187818A1 (en) 2004-09-30
US6912982B2 true US6912982B2 (en) 2005-07-05

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060000434A1 (en) * 2004-07-05 2006-01-05 Toyota Jidosha Kabushiki Kaisha Resin cylinder head cover
US20060011158A1 (en) * 2004-07-14 2006-01-19 Toyota Jidosha Kabushiki Kaisha Valve case and resin cylinder head cover
US20090186725A1 (en) * 2008-01-18 2009-07-23 Joseph Jouraij Multi-utility camshaft cap for internal combustion engine
US20140060465A1 (en) * 2012-08-31 2014-03-06 Honda Motor Co., Ltd. Water cooled internal combustion engine for vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4253635B2 (en) * 2004-11-30 2009-04-15 トヨタ自動車株式会社 Cylinder head cover
JP6194695B2 (en) 2013-08-26 2017-09-13 アイシン精機株式会社 Valve timing control device

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034406A1 (en) 1989-10-30 1991-05-29 Atsugi Unisia Corp VALVE TIMING ADJUSTMENT DEVICE FOR INTERNAL COMBUSTION ENGINES WITH A HYDRAULIC CLUTCH FOR LOCKING THE INTERNAL COMBUSTION ENGINE REVOLUTION SYNCHRONOUS ELEMENT AND THE CAM DRIVE ELEMENT WITH ADJUSTABLE PHASE
US5301639A (en) * 1992-06-26 1994-04-12 Nippondenso Co., Ltd. Valve timing control device for internal combustion engine
DE19508505A1 (en) 1994-03-10 1995-09-14 Toyota Motor Co Ltd Induction air quantity computation appts. for cylinder of IC engine
US5540197A (en) * 1995-01-27 1996-07-30 Ina Walzlager Schaeffler Kg Device for adjusting valve timing in an internal combustion engine
US5785026A (en) * 1996-04-08 1998-07-28 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism of engine
US5803031A (en) * 1996-07-03 1998-09-08 Toyota Jidosha Kabushiki Kaisha Hydraulic actuator in an internal combustion engine
US5954019A (en) * 1996-12-26 1999-09-21 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing arrangement for engine
US6032629A (en) * 1998-04-24 2000-03-07 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing arrangement
US6035817A (en) * 1997-11-19 2000-03-14 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing mechanism for engine
US6076492A (en) * 1998-03-27 2000-06-20 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head for variable valve timing
US6289861B1 (en) * 1999-05-31 2001-09-18 Yamaha Hatsudoki Kabushiki Kaisha Control for variable valve timing
US6675752B1 (en) * 1999-09-13 2004-01-13 Volkswagen Ag Internal combustion engine with hydraulic camshaft adjuster for adjusting the camshaft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5447126A (en) * 1993-11-18 1995-09-05 Unisia Jecs Corporation Variabe cam phaser for internal combustion engine

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034406A1 (en) 1989-10-30 1991-05-29 Atsugi Unisia Corp VALVE TIMING ADJUSTMENT DEVICE FOR INTERNAL COMBUSTION ENGINES WITH A HYDRAULIC CLUTCH FOR LOCKING THE INTERNAL COMBUSTION ENGINE REVOLUTION SYNCHRONOUS ELEMENT AND THE CAM DRIVE ELEMENT WITH ADJUSTABLE PHASE
US5301639A (en) * 1992-06-26 1994-04-12 Nippondenso Co., Ltd. Valve timing control device for internal combustion engine
DE19508505A1 (en) 1994-03-10 1995-09-14 Toyota Motor Co Ltd Induction air quantity computation appts. for cylinder of IC engine
US5540197A (en) * 1995-01-27 1996-07-30 Ina Walzlager Schaeffler Kg Device for adjusting valve timing in an internal combustion engine
DE19502496A1 (en) 1995-01-27 1996-08-01 Schaeffler Waelzlager Kg Device for changing the timing of an internal combustion engine
US5785026A (en) * 1996-04-08 1998-07-28 Toyota Jidosha Kabushiki Kaisha Variable valve timing mechanism of engine
US5803031A (en) * 1996-07-03 1998-09-08 Toyota Jidosha Kabushiki Kaisha Hydraulic actuator in an internal combustion engine
US5954019A (en) * 1996-12-26 1999-09-21 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing arrangement for engine
US6035817A (en) * 1997-11-19 2000-03-14 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing mechanism for engine
US6076492A (en) * 1998-03-27 2000-06-20 Yamaha Hatsudoki Kabushiki Kaisha Cylinder head for variable valve timing
US6032629A (en) * 1998-04-24 2000-03-07 Yamaha Hatsudoki Kabushiki Kaisha Variable valve timing arrangement
US6289861B1 (en) * 1999-05-31 2001-09-18 Yamaha Hatsudoki Kabushiki Kaisha Control for variable valve timing
US6675752B1 (en) * 1999-09-13 2004-01-13 Volkswagen Ag Internal combustion engine with hydraulic camshaft adjuster for adjusting the camshaft

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060000434A1 (en) * 2004-07-05 2006-01-05 Toyota Jidosha Kabushiki Kaisha Resin cylinder head cover
US7174868B2 (en) * 2004-07-05 2007-02-13 Toyota Jidosha Kabushiki Kaisha Resin cylinder head cover
US20060011158A1 (en) * 2004-07-14 2006-01-19 Toyota Jidosha Kabushiki Kaisha Valve case and resin cylinder head cover
US7121243B2 (en) * 2004-07-14 2006-10-17 Toyota Jidosha Kabushiki Kaisha Valve case and resin cylinder head cover
US20090186725A1 (en) * 2008-01-18 2009-07-23 Joseph Jouraij Multi-utility camshaft cap for internal combustion engine
US20140060465A1 (en) * 2012-08-31 2014-03-06 Honda Motor Co., Ltd. Water cooled internal combustion engine for vehicle
US9163552B2 (en) * 2012-08-31 2015-10-20 Honda Motor Co., Ltd. Water cooled internal combustion engine for vehicle

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Publication number Publication date
DE10307624A1 (en) 2004-09-02
US20040187818A1 (en) 2004-09-30

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